[makkan00]

Hi all,
Just wondering if somebody ever used Mtec brakes discs which are grooved and drilled.

Its item number
300373803874

They also do black edition which is not listed for my car though.

I am thinking of buying it for my car, as rear brakes need replacement according to OBC.

Waiting to hear response from other users.

Cheers.

[Kerr]

I take it the item number is an ebay number?

If you choose mtec discs buy direct from his own website as they are cheaper.

Reviews on other websites seem to be reasonably positive especially for the cost.

I've no idea how it's worth the guys time buying the discs and machining them for the cost he is charging.

Last time I looked he was doing discs and pads all round for the 335i for £225.

[makkan00]

Thanks for your reply. Same discs are 10 pound expensive on their website.
On ebay you can also get cashback.
So it works cheaper via e-bay.

Anybody else given it a try?
Cheers.

[Laney]

I used Mtec discs on my MR2 Turbo with EBC Red Stuff pads. Very good brakes. Couldn't fault them.

[Dr Dave]

So these are standard discs drilled and milled??

I wouldn't put such a thing on a wheelbarrow, if so.

[Laney]

Originally Posted by Dr Dave

So these are standard discs drilled and milled??

I wouldn't put such a thing on a wheelbarrow, if so.

Because?? (other than wheelbarrows not having brake discs)

I've used drilled and grooved discs on several cars and never had any of them crack or warp.

[makkan00]

Originally Posted by Laney

Because?? (other than wheelbarrows not having brake discs)

I've used drilled and grooved discs on several cars and never had any of them crack or warp.

+1 I would be interested to know why?

Drilling and grooving shouldnt effect the integrity of the discs.

[Kerr]

Originally Posted by Dr Dave

So these are standard discs drilled and milled??

I wouldn't put such a thing on a wheelbarrow, if so.

He claims the discs are CNC machined but I gather that he buys in discs then slots,grooves, drills or dimples them.

What is your issue with them?

He does not charge much for them and users seem happy.

[Laney]

The theory is that the drilling and grooving (i.e the post production machining) affects the tempered metal which can lead to fracturing, cracking and/or warping of the discs. I've never personally seen this happen if the base product is of a suitable quality.

I believe some Porsche discs are made in this way.

[Kerr]

Originally Posted by Laney

The theory is that the drilling and grooving (i.e the post production machining) affects the tempered metal which can lead to fracturing, cracking and/or warping of the discs. I've never personally seen this happen if the base product is of a suitable quality.

I believe some Porsche discs are made in this way.

The discs are subject to heat treatment. The discs would already be vented as they are cast so the heat would build up around the thinest areas.

Likewise with holes and slots prior to heat treatment the heat build up around those areas would be greater.

Once the disc is at rest, surely that's the safest time to groove, drill or slot?

[Laney]

Exactly. Aslong as the machining work is done properly with quality tools at the right speeds so as not to 'burn' the metal then there should be no problems at all.

[m1bjr]

Except that the original design (tested for TUV etc) didn't have scope for further engineering.

How do you know the modification doesnt affect the integrity of the original product, as it was designed without these weaknesses?

In short, you are guessing.

But I'm sure you'll be fine.

Just hope you don't have to justify it to, say, an accident investigator.

[Express]

stay far away from cheese grater rotors (drilled) that will eat your pads.

what point is drilled rotors when they get clogged with brake dust?

[Kerr]

Originally Posted by m1bjr

Except that the original design (tested for TUV etc) didn't have scope for further engineering.

How do you know the modification doesnt affect the integrity of the original product, as it was designed without these weaknesses?

In short, you are guessing.

But I'm sure you'll be fine.

Just hope you don't have to justify it to, say, an accident investigator.

Cast iron is really poor material.

The structure of the disc will be poor to start with.

Putting small dimples and shallow grooves will make very little difference in the structure of the disc.

[makkan00]

Originally Posted by m1bjr

Except that the original design (tested for TUV etc) didn't have scope for further engineering.

How do you know the modification doesnt affect the integrity of the original product, as it was designed without these weaknesses?

In short, you are guessing.

But I'm sure you'll be fine.

Just hope you don't have to justify it to, say, an accident investigator.

Good thinking, but do you think, accident investigator will be really ringing BMW to find out the specifications of the car, and says that these after market brake discs are responsible for something nasty.

In theory these brakes should give you better braking power under stressful conditions and many reviews on different forums confirms it.

So far I came across one complaint where black edition disc colour melted and stuck on pads (after parking the car) but as soon as the company identified the batch, they sent replacement to all the buyers with pads for free and for some customers.

I am inclined to give it a try, especially when they are cheaper than OEM product but not cheap enough to be considered as 'poor quality' parts.

[Dr Dave]

Very well said m1bjr, I just couldn't be arsed to type that sort of reply out

[makkan00]

:

Originally Posted by Dr Dave

Very well said m1bjr, I just couldn't be arsed to type that sort of reply out

What an attitude? you must have saved some time instead of what you wrote up here.

Never mind, we all are different.

[xenon]

I had some cross-drilled discs on my 944 but they were dusty and very noisy - stock was better in the end.

[HeavyRightFoot]

Years ago I bought EBC discs and pads for my RX8 and I started getting vibrations when I was braking from 70-80mph.

I took it in to a indy garage and was told it was because they were grooved and drilled and he has seen loads of 'boy racer saxos and corsas' with the same complaint when they upgrade the discs. He said mine weren't that bad and they were quite noisy so other people complaining about them must have had a nightmare.

Not sure what cars that come standard with groove/drilled discs do different or if the indy garage was giving me a load of bull??

[MEGA]

Erm. Drilled/slotted discs are fine.

I'd go EBC though.

This topic is amusing.

[makkan00]

Originally Posted by HeavyRightFoot

Years ago I bought EBC discs and pads for my RX8 and I started getting vibrations when I was braking from 70-80mph.

I took it in to a indy garage and was told it was because they were grooved and drilled and he has seen loads of 'boy racer saxos and corsas' with the same complaint when they upgrade the discs. He said mine weren't that bad and they were quite noisy so other people complaining about them must have had a nightmare.

Not sure what cars that come standard with groove/drilled discs do different or if the indy garage was giving me a load of bull??

thanks for warning, and I was looking for such critical things.

[makkan00]

Originally Posted by MEGA

Erm. Drilled/slotted discs are fine.

I'd go EBC though.

This topic is amusing.

I just looked at EBC.
They look great.
Cheers mate.